CVE-2026-33576: OpenClaw Zalo Channel Downloads Media Before Vulnerability

MODERATE
Advisory Identifier: GHSA-v2v2-f783-358j
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CVSS 9.8
CWE-862 CWE-863
Published
Advisory Summary

CVE-2026-33576 is a MODERATE (CVSS 9.8) zalo channel downloads media before vulnerability (CWE-862: Missing Authorization) affecting OpenClaw libraries in the npm ecosystem. The issue involves zalo channel downloads media before sender authorization. Remediation is available by upgrading affected packages to version 2026.3.28.

CVE-2026-33576 at a Glance

CVE Identifier CVE-2026-33576
GHSA Identifier GHSA-v2v2-f783-358j
Severity MODERATE
CVSS v3.1 Base Score 9.8
CWE Classification CWE-862: Missing Authorization
Affected Product OpenClaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-33576

To remediate this vulnerability, upgrade all affected OpenClaw dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openclaw fixed: 2026.3.28 
npm install openclaw@2026.3.28
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls openclaw

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-33576, inspect your project dependencies using npm:

npm ls openclaw

Analyze the terminal output to locate any version of OpenClaw in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2026.3.28), your application is affected.

Note: The npm ls openclaw command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In OpenClaw, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary The Zalo image path fetched and stored inbound media before the DM/pairing authorization checks ran. ## Impact Unauthorized senders could force network fetches and disk writes in the inbound media store even when the message itself was rejected. ## Affected Component `extensions/zalo/src/monitor.ts` ## Fixed Versions - Affected: `<= 2026.3.24` - Patched: `>= 2026.3.28` - Latest stable `2026.3.28` contains the fix. ## Fix Fixed by commit `68ceaf7a5f` (`zalo: gate image downloads before DM auth`). OpenClaw thanks @AntAISecurityLab for reporting.

CVE-2026-33576 Affected OpenClaw Versions

1 component(s)
Fixed Versions:
2026.3.28
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.3.28
2026.3.28

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-v2v2-f783-358j
NVD — CVE-2026-33576 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33576
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/68ceaf7a5f64a23e78b95eff055e4b497218312a
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-unauthorized-media-download-via-zalo-channel

Frequently Asked Questions

What is CVE-2026-33576?
CVE-2026-33576 is a security vulnerability in OpenClaw involving Zalo channel downloads media before sender authorization under CWE-862: Missing Authorization.
Which OpenClaw versions are affected?
Affected versions include releases prior to 2026.3.28 across affected packages: openclaw.
What version fixes CVE-2026-33576?
Upgrading to 2026.3.28 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.3.28. Upgrade your dependency to 2026.3.28 or later.
What is the CVSS score of CVE-2026-33576?
CVE-2026-33576 has a CVSS v3.1 base score of 9.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-33576?
CVE-2026-33576 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check npm dependencies for CVE-2026-33576?
Run the dependency tree command: 'npm ls openclaw'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-v2v2-f783-358j",
  "modified" : "2026-04-06T17:34:34Z",
  "published" : "2026-03-31T23:50:44Z",
  "aliases" : [ "CVE-2026-33576" ],
  "summary" : "OpenClaw: Zalo channel downloads media before sender authorization",
  "details" : "## Summary\n\nThe Zalo image path fetched and stored inbound media before the DM/pairing authorization checks ran.\n\n## Impact\n\nUnauthorized senders could force network fetches and disk writes in the inbound media store even when the message itself was rejected.\n\n## Affected Component\n\n`extensions/zalo/src/monitor.ts`\n\n## Fixed Versions\n\n- Affected: `<= 2026.3.24`\n- Patched: `>= 2026.3.28`\n- Latest stable `2026.3.28` contains the fix.\n\n## Fix\n\nFixed by commit `68ceaf7a5f` (`zalo: gate image downloads before DM auth`).\n\nOpenClaw thanks @AntAISecurityLab for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.3.28"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.3.24"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-v2v2-f783-358j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33576"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/68ceaf7a5f64a23e78b95eff055e4b497218312a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-unauthorized-media-download-via-zalo-channel"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-31T23:50:44Z",
    "nvd_published_at" : "2026-03-31T15:16:14Z"
  }
}